EBARA GS Series, Operating Instructions, Installation & Maintenance Manual

17

EBARA 

PUMPS AMERICAS CORPORATION

www.pumpsebara.com

(t) 803.327.5005 

(f) 803.327.5097

rev. 03/22

End Suction Centrifugal

GS Series

MOTOR

Fault

Causes

Measures to be taken

-

Fault in installation.

-

Check installation.

-

Bearings damaged.

-

Replace the bearings.

-

Flow rate too high.

-

Reduce the aperture of the 

    delivery valve.

-

Flow rate too low.

-

Increase the aperture of the 

    delivery valve.

-

Impeller is blocked.

-

Remove foreign bodies.

-

The direction of rotation is not 

    correct.

-

Check and correct the   

    connection.

-

Friction in the rotation areas. The

    shaft is bent.

-

Repair in specialist workshop.

-

Cavitation.

-

Seek expert advice.

-

Vibrations in the piping.

-

Reinforce the piping or fit an   

    inverter

-

Defective fitting of the mechanical 

    seal.

-

Fit it  correctly.

-

The mechanical seal is damaged.

-

Replace the mechanical seal.

-

Overpressure in delivery.

-

Review the project.

-

The shaft is bent.

-

Repair in specialist workshop.

Excessive water leakage 

from the shaft seal.

Excessive operating 

vibration and noise.

Fault

Causes

Measures to be taken

-

The winding is broken or has 

    been cut.

-

Repair in specialist workshop.

-

Stator short-circuited.

-

Repair in specialist workshop.

-

Grounded.

-

Repair in specialist workshop.

-

The bearings are blocked.

-

Repair the bearings.

-

The voltage is low.

-

Change the nominal voltage.

-

Loss of phases in the power 

    supply.

-

Check the power supply.

Motor does not start